Welcome to your Eduqas Options Which of the following muscles fatigue quickly? Eye muscles Heart muscles Lung muscles Leg muscles The muscle that maintain very long contraction are useful for Human posture Eye movement Limb movement Pumping of the heart The cross-bridge cycle according to sliding-filament theory involves Attachment of myosin to actin sites, cocking, pulling of actin, detachment and re-cock of the myosin head Detachment of mylean sheath, action potential and re-attachment of mylean sheath cocking and de-cocking of actin head Binding of ATP to ATPase What is the role of Z-discs in muscle contraction? Anchoring Actin Releasing Myosin Stabilizing Ca2+ Producing ACh Any molecule which the body recognises as foreign is An antigen An antibody Histamine A macrophage Select the incorrect statement regarding phagocytes. Phagocytes originate in the spleen. Phagocytes remove any dead cells as well as invasive microorganisms. Neutrophils participate in phagocytosis. Macrophages travel in the blood as monocytes once they are made. Which of the following explains why antibody molecules have quaternary structure? Antibodies have more than one polypeptide Antibodies have four polypeptides Antibodies have complex 3D shapes Antibodies have a variable region One of the reasons for antibiotic resistance in bacteria is Wide spectrum antibiotics Narrow spectrum antibiotics Field spectrum antibiotics Vaccination One of the symptoms not associated with flu is stomach ache headache coughing joint pain Select the incorrect statement regarding antibiotics. The selection pressure on bacteria remains unaffected by the use of antibiotics. Most antibiotics are produced by fungi. The first antibiotic to be discovered was penicillin. Penicillin stops cell wall formation in bacteria. The leading cause of death among HIV positive people. TB Influenza Measles Cancer What is the role of keratinocytes in protecting the body from infection? These form a watertight barrier on the skin. Secretion of fatty acids to prevent microbes Compete with pathogens for nutrients Kill the microbes through Putrefaction HIV infected people are prone to TB because T-helper cells are low in number Platelets are low in number Structure of hemoglobin in modified WBC are damaged Which of the following is not a symptom of Tubercolosis? Severe headache Shortness of breath Coughing up blood Chest pain Phagocytosis is carried out by APCs Platelets WBCs RBCs The task of the T-killer cells is to kill Pathogen-infected cells Viruses Bacteria Macrophages Antigen-antibody complexes are formed by A type of WBCs All types of platelets APCs T-helper cells Anopheles stephensi is the vector for Malaria Ebola Swine flu Dengue Passive immunity is acquired by an infant through Mother's milk Vaccination Exposure to live pathogens Medicines Calculation of allele frequency requires Sum of frequencies of both dominant & recessive alleles Frequency of Dominant allele only Frequency of recessive allele only Product of frequencies of both dominant & recessive alleles Cortex is the outer layer of Cerebrum Cerebrellum Hypothalamus Medula oblongata Which of the following is not a part of cerebrum? Anterial lobe Frontal lobe Parietal lobe Occipital lobe Which part of the brain helps in controlling heart rate and blood pressure? Medulla oblongata Cerebrum Cerebrellum Hypothalamus The scanners which can detect brain activity are fMRI MRI CT pCT Flexion and extension are examples of Antagonistic pairing of biceps and triceps Pumping of heart muscles Movement of quadriceps Movement of eye muscles Time is Up!